You are joking right? I don't know when the concept of Capitalism and free markets began, Possibly with Locke? But Government has always been the principal obstacle to actual free trade and Capitalism. They still are, even our government. But yes you are right in the since that they did exist before the US government. Remember that government is essentially a gang that the rest of us pay protection money to. In this since government has existed as long as there have been people.
The governments existed in Neanderthal times --- the tribal elders.